basically drowned herself in her sleep. that was the last time i saw my sister. >> that night alicia dubois died of an overdose of heroin mixed with cocaine. she is buried next to her mother leaving behind her art, pictures that tell the sad story of a young woman caught in the grip of an addiction she could not escape. >> you live a year of living with guilt and what ifs, you know, those things never go away. they're the worst emotions to have, i guess, you know, most useless, so if i can do something in alicia's name, in alicia's honor to save someone else, my daughter and i will do that, you know. >> the addicts' limited options. >> treatment, long-term treatment, or death. >> and the search for answers to the heroin problem. >> some of the largest amounts we've ever seen are being produced every single day. who's buying the heroin? we are. this is the enemy within.